/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package Controlers.Template;

import Pojos.DanhMucSanPham;
import com.google.gson.Gson;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

/**
 *
 * @author ToanNhan
 */
@WebServlet(name = "Left", urlPatterns = {"/Left"})
public class Left extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        String command = request.getParameter("command");
        if (command == null || command.length() == 0) {
            response.sendError(404);
        } else {
            if (command.toLowerCase().compareTo("laydanhsachdanhmucsanpham") == 0) {
            }
        }
    }

    protected void layDanhSachDanhMucSanPham(HttpServletRequest request, HttpServletResponse response) throws IOException {
        response.setContentType("application/json");
        PrintWriter out = response.getWriter();

        SessionFactory factory = new Configuration().configure("Pojos/hibernate.cfg.xml").buildSessionFactory();
        Session session = factory.openSession();
        Query query = session.createQuery("Select maDanhMuc, tenDanhMuc from DanhMucSanPham");
        List<DanhMucSanPham> dsDanhMucSanPham = query.list();
        String json = new Gson().toJson(dsDanhMucSanPham);
        out.print(json);
        out.flush();
        out.close();
        session.close();
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
